I used a german brand once. I gained a whole lot in strenght and size. I thouht it was super, but at the same time I started to suspect that this creatine wasn't just creatine. And what do I read in the newspaper some months after, XXXX creatine contains nandrolon. Don't remember the dosage but it was pretty high for being a "supplement". But the company is still selling the product. Guess they've removed the nandrolon. Don't know if I'm allowed to right the companys name here, but PM me and I'll tell you guys who are interested. Other then that all the diffrent brandes that I've tried were the same. Go with the cheapest, as long as it's 100% creatine monohydrat.